Well some of you may have heard already, but Microsoft has shipped a bunch of Xbox 360s out to Walmart's accross the nation. Starting this week they are being put up as a playable demo.
http://www.joystiq.com/entry/1234000753064065/<- that link, has a list of a bunch of walmarts that people have gone to or called to see if they are going to do the demo or not.
The Games available to play:
-Call of Duty 2
-Kameo
-King Kong
and videos of a bunch of other games
According to Microsoft WalMart is the first chain that are going to have Xbox 360s available to play on.